I live next to a highway in PA that gets crazy windy. I still take the bike on it to get places. Once I get over 60mph (speed limit is 65-70 depending on spot) the wind gets crazy and sometimes makes me nervous. Though at night time when it is less windy it seems like the easiest ride ever.
I think a couple things make this bike not great in the wind.
1: weight, very light bike so it doesn't take much to move it around.
2: no windshield and bad aerodynamics, the bike wasn't made to be a long ride highway cruiser. While it obviously can handle it , it wasn't it's sole purpose so the shape of the bike wasn't really made to deflect wind.
3: seating position, you sit up right on this bike. So with out that windshield the wind is actually going to turn you into a kite pretty much. The wind goes over the Speedo and then starts down gas tank until bam it hits a straight up wall. I think the small add on windshield would actually help more than it looks like it would.